A side of the triangle below has been extended to form an exterior angle of 155°. Find the value of xx.

Step-by-step explanation:

Find a similar diagram attached

Let the exterior angle be 155°

The sum of interior angle is equal to the sum of the exterior angle of the triangle

Interior angle are angles inside the triangles

Sum of interior angles = 90 + x

Exterior angles are those outside the triangle.

Exterior angle = 155°

Since sum of interior = exterior, hence;

90 + x = 155

x = 155 - 90

x = 65°

Hence the value of x is 65°

Note that the same concept can be used for any other triangle extending to form an exterior angle

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step-by-step explanation: